INVESTIGATIONS OF PRECIPITATES IN HEAT-TREATED AGPD30 CUSN6 LAYERS/

The subject of the investigations are precipitation zones, which grew as a result of chemical diffusion in AgPd30/CuSn6 bimetals. These prec ipitation zones have been characterized by metallography, electron pro be microanalysis and x-ray diffraction. The growth of precipitation zo nes in the plating layer and in the substrate layer in dependence on t ime have been determined. The use of x-ray diffraction alone for the i dentification of the precipitates could not supply satisfying results in every case. This problem was solved by the application of electron probe microanalysis using a correction method, which allows the estima tion of the chemical composition of small particles.